package servlet;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import com.google.gson.Gson;

import service.TaskInfoService;

@WebServlet("/TaskOperationServlet")
public class TaskOperationServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	// 上传文件存储目录
	private static final String UPLOAD_DIRECTORY = "uploadImg";

	// 上传配置
	private static final int MEMORY_THRESHOLD = 1024 * 1024 * 3; // 3MB
	private static final int MAX_FILE_SIZE = 1024 * 1024 * 1; // 1MB
	private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 50; // 50MB

	public TaskOperationServlet() {
		super();
	}

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		TaskInfoService service = new TaskInfoService();
		String filePath = null;
		String message = null;
		String operation = null;
		String[] tasknos = null;
		String taskno = null;
		String imgurl = null;
		String username = null;
		String brand = null;
		String type = null;
		String price = null;
		String color = null;
		String size = null;
		String freight = null;
		String totalPrice = null;
		String payNo = null;
		String goodsname = null;
		String goodsNumber = null;
		String time = null;
		String taskprice = null;
		// 检测是否为多媒体上传
		if (ServletFileUpload.isMultipartContent(request)) {
			// 配置上传参数
			DiskFileItemFactory factory = new DiskFileItemFactory();
			// 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
			factory.setSizeThreshold(MEMORY_THRESHOLD);
			// 设置临时存储目录
			factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
			ServletFileUpload upload = new ServletFileUpload(factory);
			// 设置最大文件上传值
			upload.setFileSizeMax(MAX_FILE_SIZE);
			// 设置最大请求值 (包含文件和表单数据)
			upload.setSizeMax(MAX_REQUEST_SIZE);
			// 中文处理
			upload.setHeaderEncoding("UTF-8");
			// 构造临时路径来存储上传的文件
			// 这个路径相对当前应用的目录
			String uploadPath = getServletContext().getRealPath("/") + File.separator + UPLOAD_DIRECTORY;
			// 如果目录不存在则创建
			File uploadDir = new File(uploadPath);
			if (!uploadDir.exists()) {
				uploadDir.mkdir();
			}
			try {
				// 解析请求的内容提取文件数据
				List<FileItem> formItems = upload.parseRequest(request);

				if (formItems != null && formItems.size() > 0) {
					// 迭代表单数据
					for (FileItem item : formItems) {
						switch(item.getFieldName()) {
						case "taskno": taskno = item.getString();break;
						case "username": username = item.getString();break;
						case "brand": brand = item.getString();break;
						case "type": type = item.getString();break;
						case "price": price = item.getString();break;
						case "color": color = item.getString();break;
						case "size": size = item.getString();break;
						case "freight": freight = item.getString();break;
						case "totalPrice": totalPrice = item.getString();break;
						case "payNo": payNo = item.getString();break;
						case "operation": operation = item.getString();break;
						case "goodsname": goodsname = item.getString();break;
						case "goodsNumber": goodsNumber = item.getString();break;
						case "time": time = item.getString();break;
						case "taskprice": taskprice = item.getString();break;
						}
						// 处理不在表单中的字段
						if (!item.isFormField()) {
							String fileName = new File(item.getName()).getName();
							filePath = uploadPath + File.separator + taskno + "." + fileName.split("\\.")[1];
							File storeFile = new File(filePath);
							// 保存文件到硬盘
							item.write(storeFile);
							imgurl = UPLOAD_DIRECTORY + File.separator + taskno + "." + fileName.split("\\.")[1];
						}
					}
				}
			} catch (Exception ex) {
				System.out.println(ex.getMessage());
			}
		} else {
			tasknos = request.getParameterValues("tasknos");
			operation = request.getParameter("operation");
		}
		switch (operation) {
		case "add":
			service.addTask(taskno,username,brand,type,price,color,size,freight,totalPrice,payNo, goodsname, imgurl, goodsNumber, time, taskprice);
			Map<String, Object> map = new HashMap<>();
			message = "添加订单成功!";
			map.put("message", message);
			response.getWriter().write(new Gson().toJson(map));
			break;
		case "pay":
		case "payback":
		case "transportover":
		case "lack":
		case "del":
			service.changeStatus(tasknos, operation);
			break;
		case "payfreight":
			for (String tasknot : tasknos)
				service.getMapper().payFreight(tasknot);
			break;
		}
	}
}